//The headers
#include "SDL.h"
#include "SDL_image.h"
#include <string>
#include "constants.h"
#include "classes.h"
#include "functions.h"
#include "globals.h"

Dot::Dot()
{
    //Initialize the offsets
    x = 0;
    y = 0;
    
    //Initialize the velocity
    xVel = 0;
    yVel = 0;
}

void Dot::handle_input()
{
    //If a key was pressed
    if( event.type == SDL_KEYDOWN )
    {
        //Adjust the velocity
        switch( event.key.keysym.sym )
        {
            case SDLK_UP: yVel -= DOT_HEIGHT / 2; break;
            case SDLK_DOWN: yVel += DOT_HEIGHT / 2; break;
            case SDLK_LEFT: xVel -= DOT_WIDTH / 2; break;
            case SDLK_RIGHT: xVel += DOT_WIDTH / 2; break;    
        }
    }
    //If a key was released
    else if( event.type == SDL_KEYUP )
    {
        //Adjust the velocity
        switch( event.key.keysym.sym )
        {
            case SDLK_UP: yVel += DOT_HEIGHT / 2; break;
            case SDLK_DOWN: yVel -= DOT_HEIGHT / 2; break;
            case SDLK_LEFT: xVel += DOT_WIDTH / 2; break;
            case SDLK_RIGHT: xVel -= DOT_WIDTH / 2; break;    
        }        
    }
}

void Dot::move()
{
    //Move the dot left or right
    x += xVel;
    
    //If the dot went too far to the left or right
    if( ( x < 0 ) || ( x + DOT_WIDTH > SCREEN_WIDTH ) )
    {
        //move back
        x -= xVel;    
    }
    
    //Move the dot up or down
    y += yVel;
    
    //If the dot went too far up or down
    if( ( y < 0 ) || ( y + DOT_HEIGHT > SCREEN_HEIGHT ) )
    {
        //move back
        y -= yVel;    
    }
}

void Dot::show()
{
    //Show the dot
    apply_surface( x, y, dot, screen );
}
